1. 1.3 Cells from cells Learning Objectives:
To understand the stages of cell reproduction.
Keywords:
Cell division
Mitosis
Cytokinesis
DNA replication
Prophase
Metaphase
Anaphase
Telophase
Cell plate

2. Let’s Watch a Video

3. Mitosis
The process by which the duplicated contents of the cell’s nucleus divide into two equal parts.

4. The Phases of Mitosis
Prophase
Metaphase
Anaphase
Telophase

5. Prophase Chromosome pair up! Chromosomes thicken and shorten
-become visible
-2 chromatids joined by a centromere
Centrioles move to the opposite sides of the nucleus
Nucleolus disappears
Nuclear membrane disintegrate

7. Metaphase Chromosomes meet in the middle!
Chromosomes arrange at equator of cell
Become attached to spindle fibres by centromeres
Homologous chromosomes do not associate

9. Anaphase Chromosomes get pulled apart
Spindle fibres contract pulling chromatids to the opposite poles of the cell

10. Telophase Now there are two! Chromosomes uncoil
Spindle fibres disintegrate
Centrioles replicate
Nucleur membrane forms
Cell divides

13. TASK
Using the materials provided, make a 3D model of the phase of mitosis assigned to you.
15 minutes

14. What is Cytokinesis
This is the last stage of the cell cycle & it completes the process of cell division
During Cytokinesis the cytoplasm divides
Organelles are distributed into each of the new cells
When cytokinesis is complete two new cells (daughter cells) have formed
Cory

15. At the end of cytokinesis each cell enters interphase and the cell cycle begins.
Michelle

16. Cytokinesis in animal cells
During cytokinesis in animal cells the cell membrane squeezes together around the middle of the cell.
The cytoplasm forms into two cells.
Each daughter cell gets about 1/2 of the organelles.
Laura

17. Cytokinesis in plant cells
Because the plant cell has a cell wall unlike the animal cell, it can’t squeeze together like the cell membrane can.
Instead a structure called the cell plate forms across the middle of the cell and the cell gradually splits into two cells.
Then two new cell wall forms
Laura

18. Cytokinesis in a plant cell
Can you spot the Cell plate??
Addison

19. Cytokinesis in a animal cell.
Addison
Cytokinesis in a animal cell.
The arrow’s point out the cell membrane seperating

20. Cytokinesis In Animal And Plant Cells
Cleavage furrow
Contractile ring of microfilaments
Daughter cells
100 µm
1 µm
Vesicles forming cell plate
Wall of patent cell
Cell plate
New cell wall
(a) Cleavage of an animal cell (SEM)
(b) Cell plate formation in a plant cell (SEM)
Daughter cells